Trademark Acknowledgments:

IBM is a registered trademark and PS/2 is a trademark of IBM.

Windows is a trademark of Microsoft Corporation.
ELAN and ELAN logo

are trademarks of ELAN Microelectronics Corporation.

2005 by ELAN Microelectronics Corporation

Printed in Taiwan

The contents of this specification are subject to change without further notice. ELAN Microelectronics assumes
no responsibility concerning the accuracy, adequacy, or completeness of this specification. ELAN
Microelectronics makes no commitment to update, or to keep current the information and material contained in
this specification. Such information and material may change to conform to each confirmed order.

In no event shall ELAN Microelectronics be made responsible for any claims attributed to errors, omissions, or
other inaccuracies in the information or material contained in this specification. ELAN Microelectronics shall not
be liable for direct, indirect, special incidental, or consequential damages arising from the use of such information
or material.

The software (if any) described in this specification is furnished under a license or nondisclosure agreement, and
may be used or copied only in accordance with the terms of such agreement.

ELAN Microelectronics products are not intended for use in life support appliances, devices, or systems. Use of
ELAN Microelectronics product in such applications is not supported and is prohibited.
NO PART OF THIS SPECIFICATION MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS WITHOUT THE EXPRESSED WRITTEN PERMISSION OF ELAN MICROELECTRONICS.

ELAN MICROELECTRONICS CORPORATION

Headquarters:

No. 12, Innovation Road 1
Hsinchu Science Park
Hsinchu, Taiwan 30077
Tel: +886 3 563-9977
Fax: +886 3 563-9966

http://www.emc.com.tw

Hong Kong:
Elan (HK) Microelectronics
Corporation, Ltd.

Rm. 1005B, 10/F Empire Centre
68 Mody Road, Tsimshatsui
Kowloon , HONG KONG
Tel: +852 2723-3376
Fax: +852 2723-7780

elanhk@emc.com.hk

USA:
Elan Information
Technology Group

1821 Saratoga Ave., Suite 250
Saratoga, CA 95070
USA
Tel: +1 408 366-8223
Fax: +1 408 366-8220

Europe:
Elan Microelectronics Corp.
(Europe)

Siewerdtstrasse 105
8050 Zurich, SWITZERLAND
Tel: +41 43 299-4060
Fax: +41 43 299-4079

http://www.elan-europe.com

Shenzhen:
Elan Microelectronics
Shenzhen, Ltd.

SSMEC Bldg., 3F, Gaoxin S. Ave.
Shenzhen Hi-Tech Industrial Park
Shenzhen, Guandong, CHINA
Tel: +86 755 2601-0565
Fax: +86 755 2601-0500

Shanghai:
Elan Microelectronics
Shanghai Corporation, Ltd.

23/Bldg. #115 Lane 572, Bibo Road
Zhangjiang Hi-Tech Park
Shanghai, CHINA
Tel: +86 021 5080-3866
Fax: +86 021 5080-4600

Contents

Product Specification (V1.0) 11.15.2002

iii

Contents

1 General

Description .................................................................................................. 1

2 Features ..................................................................................................................... 1
3 Application................................................................................................................. 1
4 Pin

Assignment ......................................................................................................... 2

5 Pin

Descriptions........................................................................................................ 2

6 Function

Descriptions .............................................................................................. 2

6.1 Decoder

Buffer ................................................................................................... 2

6.2 Power-on Reset and Self Test............................................................................ 3
6.3 Decoder Data Output ......................................................................................... 3
6.4 Decoder Data Input ............................................................................................ 3
6.5 Device

ID............................................................................................................ 3

6.6 Command From the System .............................................................................. 4

6.6.1 Set/Reset Status Indicators (Hex ED) .................................................................4
6.6.2 Echo

(Hex EE).....................................................................................................4

6.6.3 Invalid

commands

(Hex EF and F1)....................................................................4

6.6.4 Select

Alternate

Scan Code (Hex F0) .................................................................4

6.6.5 Read

(Hex F2) ................................................................................................5

6.6.6 Set

Typematic

Rate/Delay (Hex F3)....................................................................5

6.6.7 Enable

(Hex F4) ..................................................................................................6

6.6.8 Default

Disable ( Hex F5)....................................................................................6

6.6.9 Set

Default (Hex F6)............................................................................................6

6.6.10 Set All Keys (Hex F7, F8, F9, FA) .......................................................................6
6.6.11 Set Key Type ( Hex FB,FC,FD )..........................................................................7
6.6.12 Resend ( Hex FE )...............................................................................................7
6.6.13 Reset ( Hex FF )..................................................................................................7

6.7 Command to the System.................................................................................... 7

6.7.1 Acknowledge

( Hex FA )......................................................................................7

6.7.2 BAT

Completion

Code ( Hex AA )........................................................................7

6.7.3 BAT Failure Code ( Hex FC ) ..............................................................................7
6.7.4 Echo

(

Hex EE )...................................................................................................7

6.7.5 Keyboards

ID ( Hex 83AB ).................................................................................8

6.7.6 Keyboard buffer Overrun ( Hex 00 or FF ) ..........................................................8
6.7.7 Resend

(

Hex FE )...............................................................................................8

Keyboard Scan Code Table ...................................................................................... 8
7.1 Scan Code Set 1 ................................................................................................ 8
7.2 Scan Code Set 2 .............................................................................................. 11
7.3 Scan Code Set 3 .............................................................................................. 13
7.4 New key codes for scan set 1 .......................................................................... 15
7.5 New key codes for scan set 2 .......................................................................... 15
7.6 New Key codes for scan set 3.......................................................................... 16

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